TM-5-2350-378-24-P

HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

TM-5-2350-378-24-P - Page 186 of 790

TM 5--2350--378--24&P

EJECTOR CREEPS -- Continued

0011 00

Figure 12. HDC Control Box

EJECTOR CYLINDER INTERNAL LEAKAGE TEST

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 12,

item 4) on the HDC control box.

Using LINE UP or LINE DOWN button (Figure 12, item 2), select V1 on the HDC display

(Figure 12, item 1). Close V1 on the HDC display (Figure 12, item 1), by selecting the

CHANGE POSITION button (Figure 12, item 3) on the HDC control box.

Start engine and have assistant hold EJECTOR CONTROL lever in the BACK position

for one minute. Mark position of ejector at side of hull and continue to hold lever in the

BACK position for one more minute. Check position of ejector while still holding lever in

the BACK position. If ejector has moved forward (extends) more than 0.5 in. (13 mm),

the ejector cylinder is leaking excessively. If the ejector has moved backwards (retracts)

more than 0.5 in. (13 mm), solenoid valve V1 on the primary manifold is leaking.

Stop engine and relieve hydraulic pressure.

Follow ejector control valve leakage test from block 4.

END OF WORK PACKAGE

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